Enter a string to determine if it has several letters, several numbers, or other characters

public static void Main (string[] args) {

int count_abc=0,count_num=0,count_oth=0;
Enter a number of strings
Scanner scan=new Scanner (system.in);
String str = Scan.next ();
char[] chars = Str.tochararray ();
Judging each character
for (int i = 0;i<chars.length;i++) {
if ((chars[i]>=65&&chars[i]<=90) | | | (chars[i]>=97&&chars[i]<=122)) {
count_abc++;
}else if (chars[i]>=48&&chars[i]<=57) {
count_num++;
}else{
count_oth++;
}
}
SYSTEM.OUT.PRINTLN ("The Letters are:" +count_abc+ ");
System.out.println ("Number:" +count_num+ ");
System.out.println ("Others are:" +count_oth+ ");
}

Enter a string to determine if it has several letters, several numbers, or other characters